Pharmaceutical compositions with attenuated release of phenolic opioids

Abstract

Pharmaceutical compositions and their methods of use are provided, where the pharmaceutical compositions comprise a phenolic opioid prodrug that provides enzymatically-controlled release of a phenolic opioid, and an enzyme inhibitor that interacts with the enzyme(s) that mediates the enzymatically-controlled release of the phenolic opioid from the prodrug so as to attenuate enzymatic cleavage of the prodrug.

That which is claimed is: 
     
       1. A pharmaceutical composition, which comprises a trypsin inhibitor and a compound of general formula (II):
   X—C(O)—NR 1 —(C(R 2 )(R 3 )) n —NH—C(O)—CH(R 4 )—NH(R 5 )  (II)
 
 or a pharmaceutically acceptable salt thereof, in which: 
 X represents a residue of a phenolic opioid selected from the group consisting of buprenorphine, dihydroetorphine, diprenorphine, etorphine, hydromorphone, levorphanol, morphine, nalmefene, naloxone, N-methylnaloxone, naltrexone, N-methylnaltrexone, oxymorphone, oripavine, ketobemidone, dezocine, pentazocine, phenazocine, butorphanol, nalbuphine, meptazinol, O-desmethyltramadol, tapentadol, and nalorphine, wherein the hydrogen atom of the phenolic hydroxyl group is replaced by a covalent bond to —C(O)—NR 1 —(C(R 2 )(R 3 )) n —NH—C(O)—CH(R 4 )—NH(R 5 ); 
 R 1  is selected from alkyl, substituted alkyl, arylalkyl, substituted arylalkyl, aryl and substituted aryl; 
 each R 2  is independently selected from hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, acyl, and aminoacyl; 
 each R 3  is independently selected from hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, acyl, and aminoacyl; 
 or R 2  and R 3  together with the carbon to which they are attached form a cycloalkyl or substituted cycloalkyl group, or two R 2  or R 3  groups on adjacent carbon atoms, together with the carbon atoms to which they are attached, form a cycloalkyl or substituted cycloalkyl group; 
 n represents an integer from 2 to 4; 
 R 4  represents —CH 2 CH 2 CH 2 NH(C═NH)NH 2  or —CH 2 CH 2 CH 2 CH 2 NH 2 , the configuration of the carbon atom to which R 4  is attached corresponding with that in an L-amino acid; and 
 R 5  represents a hydrogen atom, an N-acyl group, a residue of an amino acid, a dipeptide, or an N-acyl derivative of an amino acid or dipeptide. 
 
     
     
       2. The pharmaceutical composition of  claim 1 , wherein R 1  represents a (1-4C)alkyl group. 
     
     
       3. The pharmaceutical composition of  claim 1 , wherein R 1  represents a methyl or ethyl group. 
     
     
       4. The pharmaceutical composition of  claim 1 , wherein R 1  represents a methyl group. 
     
     
       5. The pharmaceutical composition of  claim 1 , wherein each of R 2  and R 3  each independently represents a hydrogen atom or a (1-4C)alkyl group. 
     
     
       6. The pharmaceutical composition of  claim 1 , wherein R 5  is acetyl, benzoyl, malonyl, piperonyl, succinyl, N-acetylarginine or N-acetyllysine. 
     
     
       7. The pharmaceutical composition of  claim 1 , wherein R 2  and R 3  are hydrogen. 
     
     
       8. The pharmaceutical composition of  claim 1 , wherein R 2  and R 3 which are on the same carbon are alkyl. 
     
     
       9. The pharmaceutical composition of  claim 1 , wherein R 2  and R 3 which are on the same carbon form a spirocycle. 
     
     
       10. The pharmaceutical composition of  claim 1 , wherein R 2  and R 3 which are on the same carbon are methyl. 
     
     
       11. The pharmaceutical composition of  claim 1 , wherein R 2  and R 3 can modulate a rate of intramolecular cyclization. 
     
     
       12. The pharmaceutical composition of  claim 1 , wherein R 2  and R 3 comprise an electron-withdrawing group or an electron-donating group. 
     
     
       13. The pharmaceutical composition of  claim 1 , wherein—[C(R 2 )(R 3 )] n — is selected from; —CH(CF 3 )CH(CF 3 )—; —CH 2 CH(F)CH 2 —; —CH 2 C(F 2 )CH 2 —; —CH 2 CH(C(O)NR 20 R 21 )—; —CH 2 CH(C(O)OR 22 )—; —CH 2 CH(C(O)OH)—; —CH(CH 2 F)CH 2 CH(CH 2 F)—; —CH(CHF 2 )CH 2 CH(CHF 2 )—; —CH(CF 3 )CH 2 CH(CF 3 )—; —CH 2 CH 2 CH(CF 3 )—; —CH 2 CH 2 CH(C(O)NR 23 R 24 )—; —CH 2 CH 2 CH(C(O)OR 25 )—; and —CH 2 CH 2 CH(C(O)OH)—, in which R 20 , R 21 , R 22  and R 23  each independently represents hydrogen or (1-6C)alkyl, and R 24  and R 25  each independently represents (1-6C)alkyl. 
     
     
       14. The pharmaceutical composition of  claim 1 , wherein one of R 2  and R 3  is aminoacyl. 
     
     
       15. The pharmaceutical composition of  claim 1 , wherein one of R 2  and R 3  is 
       
         
           
           
               
               
           
         
       
       wherein each R 10  is independently selected from hydrogen, alkyl, substituted alkyl, and acyl, and R 11  is alkyl or substituted alkyl. 
     
     
       16. The pharmaceutical composition of  claim 1 , wherein n represents 2 or 3. 
     
     
       17. The pharmaceutical composition of  claim 1 , wherein n represents 2. 
     
     
       18. The pharmaceutical composition of  claim 1 , wherein R 4  represents —CH 2 CH 2 CH 2 NHC(═NH)(NH 2 ). 
     
     
       19. The pharmaceutical composition of  claim 1 , wherein R 5  represents an N-acyl group. 
     
     
       20. The pharmaceutical composition of  claim 19 , wherein the N-acyl group is an N-(1-4C)alkanoyl, N-benzoyl or N-piperonyl group. 
     
     
       21. The pharmaceutical composition of  claim 19 , wherein R 5  is acetyl, benzoyl, malonyl, piperonyl, succinyl, N-acetylarginine or N-acetyllysine. 
     
     
       22. The pharmaceutical composition of  claim 1 , wherein R 5  is an acetyl, glycinyl or N-acetylglycinyl group. 
     
     
       23. The pharmaceutical composition of  claim 22 , wherein R 5  is an acetyl group. 
     
     
       24. The pharmaceutical composition of  claim 1 , wherein the group —C(O)—CH(R 4 )—NH(R 5 ) is N-acetylarginine. 
     
     
       25. The pharmaceutical composition of  claim 1 , wherein the trypsin inhibitor is derived from soybean. 
     
     
       26. The pharmaceutical composition of  claim 1 , wherein the trypsin inhibitor is an arginine mimic or a lysine mimic. 
     
     
       27. The pharmaceutical composition of  claim 22 , wherein the arginine mimic or lysine mimic is a synthetic compound. 
     
     
       28. The pharmaceutical composition of  claim 1 , wherein the trypsin inhibitor is a compound of formula: 
       
         
           
           
               
               
           
         
         wherein: 
         Q 1  is selected from —O-Q 4  or -Q 4 —COOH, where Q 4  is C 1 -C 4  alkyl; 
         Q 2  is N or CH; and 
         Q 3  is aryl or substituted aryl. 
       
     
     
       29. The pharmaceutical composition of  claim 1 , wherein the trypsin inhibitor is a compound of formula: 
       
         
           
           
               
               
           
         
         wherein: 
         Q 5  is —C(O)—COOH or —NH-Q 6 -Q 7 -SO 2 —C 6 H 5 , where 
         Q 6  is —(CH 2 ) p —COOH; 
         Q 7  is —(CH 2 )—C 6 H 5 ; and 
         p is an integer from one to three; and 
         r is an integer from one to three. 
       
     
     
       30. The pharmaceutical composition of  claim 1 , wherein the trypsin inhibitor is selected from
 (S)-ethyl 4-(5-guanidino-2-(naphthalene-2-sulfonamido)pentanoyl)piperazine-1-carboxylate; 
 (S)-ethyl 4-(5-guanidino-2-(2,4,6-triisopropylphenylsulfonamido)pentanoyl)piperazine-1-carboxylate; 
 (S)-ethyl 1-(5-guanidino-2-(naphthalene-2-sulfonamido)pentanoyl)piperidine-4-carboxylate; 
 (S)-ethyl 1-(5-guanidino-2-(2,4,6-triisopropylphenylsulfonamido)pentanoyl)piperidine-4-carboxylate; 
 (S)-6-(4-(5-guanidino-2-(naphthalene-2-sulfonamido)pentanoyl)piperazin-1-yl)-6-oxohexanoic acid; 
 4-aminobenzimidamide; 
 3-(4-carbamimidoylphenyl)-2-oxopropanoic acid; 
 (S)-5-(4-carbamimidoylbenzylamino)-5-oxo-4-((R)-4-phenyl-2-(phenylmethylsulfonamido)butanamido)pentanoic acid; 
 6-carbamimidoylnaphthalen-2-yl 4-(diaminomethyleneamino)benzoate; and 
 4,4′-(pentane-1,5-diylbis(oxy))dibenzimidamide. 
 
     
     
       31. The pharmaceutical composition of  claim 1 , wherein the trypsin inhibitor is 6-carbamimidoylnaphthalen-2-yl 4-(diaminomethyleneamino)benzoate.